Best AI Research Tools
AI tools for finding, reading and mapping research papers, with citations you can check against the original source.
How we picked
Every tool here cites its sources or works from a database of published papers. All have a free plan; paid plans mainly raise limits on searches, reports and PDF uploads.
At a glance
| Tool | Pricing | Free plan | Open source | API |
|---|---|---|---|---|
| Free / Education Pro $10/month | ||||
| Free / Pro $49/user/month | ||||
| Consensus | Free / Pro $20/month | |||
| SciSpace | Free / Premium $12/month | |||
| Semantic Scholar | Free | |||
| Gemini Notebook (formerly NotebookLM) | Free / Plus $4.99/month | |||
| ResearchRabbit | Free / RR+ monthly $12.50/month | |||
| Litmaps | Free / Pro $10/month | |||
 scite | Free / Basic $20/month | |||
 Undermind | Free / Pro Academic $20/month | |||
 Ai2 Asta | Free | |||
 Connected Papers | Free |
The 12 tools
1
Perplexity
Free / Education Pro $10/monthSource-linked AI search with multi-model research and agent features
Free planAPIPaid from: Education Pro · $10/monthPerplexity is an AI answer engine for current web research, source-linked answers, file analysis, and computer-assisted tasks. It serves individuals, students, developers, and organizations, with plans ranging from free access to enterprise tiers. Buyers should compare research limits, privacy arrangements, connected features, and verification needs before selecting a plan.
- Best for
- Researchers needing current answers with inline citations.
- Strength
- Inline citations place source links beside answer claims.
- Drawback
- Citations still require checking against the linked page.
2
Elicit
Free / Pro $49/user/monthAI workflows for literature search, review, and research reports
Free planAPIPaid from: Pro · $49/user/monthElicit is a web research assistant for finding papers, extracting study details, building literature reviews, and generating research reports. Basic is free, Pro costs $49 per user monthly when billed annually, and Scale costs $169 per user monthly when billed annually. It also sells custom Enterprise plans and offers API access on paid tiers.
- Best for
- It suits academics conducting structured literature searches and systematic reviews.
- Strength
- The product combines search, screening, extraction, and reporting in one workflow.
- Drawback
- Monthly capacity depends on task complexity rather than one fixed action quota.
- 3
Consensus
Free / Pro $20/monthEvidence-linked search and synthesis for academic literature
Free planAPIPaid from: Pro · $20/monthConsensus is an AI academic search engine from Consensus NLP, Inc. that produces citation-linked answers from scholarly literature. It supports paper discovery, evidence comparison, Study Snapshots, Deep Reviews, and API or MCP access. Free access covers core searches, while Pro and Deep add capacity. Users should verify summaries against original studies.
- Best for
- Students who need a quick, cited starting point for a literature search.
- Strength
- Every generated answer is designed to link claims back to scholarly papers.
- Drawback
- The company does not publicly identify the language models behind generation.
- 4
SciSpace
Free / Premium $12/monthA research workspace for finding, reading, comparing, and writing scientific literature
Free planPaid from: Premium · $12/monthSciSpace is an academic research workspace for finding papers, comparing evidence, chatting with PDFs, and drafting scholarly work. Its Agent combines search, synthesis, writing, and presentation tasks for students, researchers, and R&D teams. A free Basic tier includes 100 monthly credits, while paid plans start at $12/month when billed annually or $20/month monthly.
- Best for
- Graduate students building literature reviews from large paper collections.
- Strength
- SciSpace indexes more than 200 million research papers, according to its literature review guide.
- Drawback
- Agent credits expire at the end of each subscription cycle.
- 5
Semantic Scholar is a free, AI-assisted scholarly search and discovery service developed by Ai2 for researchers, students, and developers working with scientific literature. It searches more than 214 million papers and offers summaries, citation analysis, libraries, recommendations, and a public API. The entry price is $0.
- Best for
- Researchers conducting broad literature discovery across scientific fields.
- Strength
- It searches more than 214 million scientific papers across fields.
- Drawback
- Generative answers can contain factual errors and require verification.
- 6
Source-grounded research, study aids, and multimedia summaries
Free planPaid from: Plus · $4.99/monthGemini Notebook, formerly NotebookLM, is Google’s source-grounded research and study workspace. It turns documents and links into cited answers, audio and video overviews, reports, and study aids for students, researchers, and teams. A free Standard tier is available, while Google AI Plus starts at $4.99/month in the United States.
Google renamed NotebookLM to Gemini Notebook on July 16, 2026. It remains the same standalone product, and existing notebooks remain accessible.
- Best for
- Students turning notes and recordings into study aids.
- Strength
- Answers are grounded in user-selected sources and include citations.
- Drawback
- Daily and monthly quotas can restrict frequent artifact generation.
- 7
Visual citation discovery that grows from the papers you know
Free planPaid from: RR+ monthly · $12.50/monthResearchRabbit is a visual literature discovery and citation mapping tool for researchers, students, and teams. Its free tier supports searching, collections, collaboration, and library uploads, while RR+ adds larger seed limits, advanced controls, projects, Signals, and faster support. Litmaps acquired the product in May 2025, but it remains a separate active brand.
Litmaps acquired ResearchRabbit in May 2025. ResearchRabbit remains an active product and brand on its own domain, with RR+ pricing published in 2026.
- Best for
- Researchers expanding a review from known seed papers.
- Strength
- Citation maps make paper and author relationships easy to inspect.
- Drawback
- Published pricing conflicts between $10 and $12.50 monthly copy.
- 8
Litmaps
Free / Pro $10/monthVisual citation mapping for finding and monitoring research
Free planAPIPaid from: Pro · $10/monthLitmaps is a hosted literature discovery service for researchers, students and teams that maps citation relationships across more than 270 million papers. Its free plan supports up to 20 inputs and 100 articles per map, while Pro starts at $10 per month. It suits researchers who prefer visual exploration and alerts over conventional keyword search.
- Best for
- Researchers tracing citation relationships across a broad topic.
- Strength
- Maps citation, semantic and co-author relationships visually.
- Drawback
- The free plan limits inputs, articles and collaboration.
- 9
scite
Free / Basic $20/monthCitation context and evidence checks for scientific research
Free planAPIPaid from: Basic · $20/monthscite is a scientific literature search and evaluation platform built around Smart Citations, which show how later papers support, contrast with, or mention earlier findings. It serves researchers, students, librarians, and R&D teams that need citation context. A free plan is available, while Basic costs $20 monthly or $144 annually.
- Best for
- Researchers checking how important findings were used by later papers.
- Strength
- Smart Citations expose support, contrast, and mention context instead of counts alone.
- Drawback
- Automated citation classifications require human checking.
- 10
Undermind
Free / Pro Academic $20/monthAn AI co-researcher for complex scientific literature
Free planPaid from: Pro Academic · $20/monthUndermind is an AI literature research agent for scientists, doctors, and R&D teams investigating difficult technical questions. It asks follow-up questions, searches papers, traces citations, and produces cited reports. A free plan is available, while Academic Pro costs $20 monthly or $16 monthly billed annually.
- Best for
- Scientists investigating narrow questions with unfamiliar terminology.
- Strength
- Adaptive citation trails can uncover papers keyword searches miss.
- Drawback
- Deep searches take minutes rather than seconds.
- 11
Ai2 Asta is a web-based scientific research assistant from the nonprofit Allen Institute for AI. It serves researchers, students, analysts, and science communicators who need cited literature discovery or structured-data analysis. Asta is free to use, with a one-time grant of 1,000 credits and no published paid tier.
- Best for
- Researchers needing cited literature discovery without subscription fees.
- Strength
- The free service includes literature search, reports, and data analysis.
- Drawback
- Theory generation commonly takes 20 to 30 minutes.
- 12
Connected Papers is a visual literature discovery tool for exploring papers related to a known seed. Its graph shows prior work, derivative work, and connected research using citation relationships and bibliographic coupling. Free access costs $0 with five monthly graphs, while Academic and Business plans remove that limit. It supports orientation, not systematic review completeness.
- Best for
- It is best for researchers beginning with a strong seed paper and exploring related work.
- Strength
- Graphs make paper clusters and relationships visible at a glance.
- Drawback
- The free plan is limited to five graphs each month.
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